Vapour barrier for kitchen reno

9/7/2016 at 1:13:28 PM

No, that would trap any moisture between both and become problematic quickly.

9/7/2016 at 7:32:03 PM

Agreed. One layer only. Can double the plastic layers but do not sandwich the drywall.

9/7/2016 at 8:20:46 PM

I've never heard or thought of doing that. So great question but the answer is no you cannot place vapour between the drywall. The 2 mil poly is garbage and it's not even close to being a true vapourbarrier that will hold heat in your home and the reverse hold the heat from coming in your home from the attic space. So mould needs a paper source to grow and placing the poly between the drywall will be leaving your attic space wide open for mould problems in the future. You need to remove drywall. 2 mil (sandwich wrap) accoustical seal the perimeter and poly ceiling with 6 mil poly / tape all seams. Then drywall re blowin attic space. Renos should only be done the right way or you'll regret and start all over a few years down the road.

Cheers,

BMUSCOTTY

9/7/2016 at 8:41:12 PM

Hi,

Rory from Compass Construction. Existing vapour barrier appears to be too light 2mm? Not a big job to install and replace barrier and drywall.

9/7/2016 at 9:21:32 PM

No adding an in-between layer will cause moisture to get trapped then mold sets in an causes way to many problems.

You can add blow in insulation to get r value to 50 or tear down re poly 6mm and re drywall.

9/8/2016 at 11:41:17 PM

No you would have to go back to the rafters and replace the vapour barrier. Depending on your attic you could look at spray foam on top as it will provide a vapour barrier.

9/9/2016 at 1:03:05 PM

Hi guys,

Thanks for the great advice. Looks like I'm taking down some drywall this week end.

Jim